Bow shuttle



Patented Jan. 5, 1926.

' UNITED STATES 1,568,599 PATE OFFICE."

orr'ro HACKENBEBG, or-rnrnitsomwnw JERSEY.

Bow SHUTTLE.

' Application filed Jui fi, 1925. Serial No. 40,785.

Low shuttles for ribbon looms are usually constructed of wood, sometimesall in one piece but usually with the runner or body portion of onepiece and the bow of another.

Such shuttles are weak and frequently frac-' ture' across the 'bow whichit is necessary to carve out from a block of the wood; ,they requirevery skillful labor and a considerable amount of time to form them,particularly with respect to the shaping of the bow'and I fitting it tothe runner; they are .unduly heavy and also thick in the bow, so thatthey begin in a short time to sag and cause wear of the shuttle groovesand the blocks in which the shuttles travel and they are likely to rubon the warp threads to a harmful extent; and their provision forguiding" the filling tension springs is such that the deli- Other holes10 .are formed in the front face I cacy of action ofsuch springs isimpaired. The object of this invention isto provide a bow shuttle whichshall represent an improvei'nent on ordinary bow shuttles in all theserespects. i

To this end I form the runner or body portion of the shuttle of wood, asusual, but

the'bow I form of a tough, grainless niatevery snugly; and one advantageof the rial, such as fibre, which is preferred because it is light inweight. My invention in part consists in a shuttle of the bow typehaving a runner and a bow secured thereto which is formed of a. strip ofgrainless material, as fibre, bent to the bow-shape. The inventionfurther. consists in certain combinations of parts concerned with thejoining of the bow to the runner and the-guiding of the tension springsfor the filling. In the drawing,

Fig. 1 is an underneath plan of my im-;

provedshuttle, partly in section;

Fig. 2 is a front elevation thereof;

Fig. 3 is a top plan view; and

Fig. 4C a section on line 4-4, Fig. 2. g

The runner 1 of the improved shuttlemay have substantially the same formas the runner of the ordinary bow shuttle, its under side being formedwith a longitudinal groove 2 having the usual toothed driving rack 2 andits top side having the longitudinal guide groove .3. The runner willusually be formed of hardwood.

' To form the how 4 I take a straight strip of fibre and bend it to theform of a bow,

preferablywith its end portions'approxi- 'inately perpendicular to thesame plane. The ends'5 of these end portions are cut off smooth so as tocoincide with such plane;

dowel holes 6 are formed in said end portions; holes 7 are formedthrough the end portions so as to converge with respect to each other;and certain other operations are performed on the bow (for the mountingof the filling package and guiding of the filling, as will appear), andit will be understood that it is not material so far as the inventionitself is concerned whether these are done before the strip to form thebow is bent into shape or at any other stage in the operation of formingthe finished shuttle.

Dowel holes 8 are formed in the front face of the runner to match theholes 6 inthe ends of the bow, and these and the said holes 6 receivedowels9, preferably of metal, whereby the bow is joined to the runner.

of the runner, each preferably between the These holes 10 and the holes7 are made to guides for the tension springs of the shuttle. The dowels9 and 11 of course fit the holes dowels .11 is that since they are bentthey obtain a' good hold on theibow, the joint between the bow andshuttle thereby being very greatly reinforccd by them.

The holes 10 are counterbores of holes 12 which extend clear through therunner from front to rear. Through each such hole 12 andthecorresponding tubular dowel 11 extends a spiral spring 13 one end ofwhich is secured in the usual way to the back of the shuttle by a brad land the other end of which carries a ring guide 15 of a di aineter toogreat to enter the hole 7 The bends in the tubular dowels 11 arepreferably gradual curves. Ordinarily these springs extend through holesformed longitudinally in the legs or end portions of the bow andemerging at the inner surfaces of such legs in such manner that eachspring assumes a sharp bend where'it protrudes, wherefore the springdoes not act for its full bow and the adjoining end of the runner. I

extent and the delicacy of the tension is im paired; an advantage inbending each dowel 11 in a curve is that the full length of the springremains available.

The filling package 16 is arranged as'u'sual on a spindle 17 having oneend 17 (Fig.2) bent off, this end being fitted to slot'18 in one leg ofthe bow and the other entered into a hole 19 in the other leg. In thearch of the bow is the delivery eye 20through which the thread A fromthe filling package extends after successively passing through the eyesor guides and a ringguide or eye 21 attached by a clip 22 to the bow. 23is the usual brake device for the package.

Since the bow itself is of grainle'ss material it is very strong and isnot susceptible of injury. It may be thinned down to whatever' extentrequired (see the front elevation, Fig: 2) so as to avoid as much aspossible its rubbing on the warp.

By forming thebow from a strip of grainless material bent to bow form Iavoid the labor incident to a molding operation and also the likelihoodof such (molded) bow warping out of shape in course of time, which wouldcertainly occur in the case where the legs of the bow are not greatlythickened up but for the sake of lightness are formed only thick enoughto afford good dowel joints between the bow and runner, as hereinillustrated.

()r'dinar'y bow shuttles are necessarily heavy in the bow, which causessuch a wearing away of the shuttle grooves 2 and 3 and thecorresponding'parts of the shuttle blocks in which they travel that theshuttles sag in Y time.

In bow shuttles. in which the runner and bow are separate parts joinedtogether and the ends of the bow abut an exterior surface of the runnerthefilling frequently c'atches 'what I claim and desire to 'secure'byLetters Patent is: V I

1. In a shuttle,the combination of'a runnor, a bow havingits"endsadjoining the I runner, and a dowel fitted at one endin therunner and having its other end bent off and fitted in an end portion ofthe bow.

Thedevic'es 11, r

2. In a shuttle, the combination of a run her, a bow having its endsadjoining'the runner, and a dowel fitted atone end in the runner lateralof one end portion of the bow andliavin'g its other'eiid portion bentoff and fitted into such end portion of the bow.

8. In a shuttle, the combination of a runner, a bow having its endsadjoining the runner,' and a dowel fitted at one end in the runnerbetween one end portion of the bow and the adjoining end of the runnerand its other end portion bent off and fitted into such end portion ofthe bow.

4. In combination, with a shuttle structure including a runner, a bowhaving its ends adjoining the runner and ahole therethrough emerging atan exposed surface of the bow and a tubular dowel fitted into said holeand into the runner and thereby joining the runner and bowya tensiondevice arranged in the dowel and including a spring secured to theshuttle structure for tensioning.

5. In combination, with a shuttle structure including a runner a bowhaving its ends adjoining the runner and a hole extending through thebow from one exposed surface to a substantially opposite Xposed surfacethereof and a tubular dowel having one end. fitted into th runnerlateral of the bow and its other end bent off and fitted in said hole,tension device arranged in the dowel and including a spring secured tothe shuttle structure for tensioning.

6. In combination, with a shuttle structure having a runner portion anda bow portion and a hole in the bow portion extending therethrough fromone exposed surface to a substantially opposite exposed surface thereofand a tubular device having one end'fitted 'intothe runner portionlateral of the bow "po1't1on' an'd itso'ther end bentofi' and fitted inthe crevices which in the use of the shut-- in said hole, a tensiondevice arranged in said tubular device and including a spring secured tothe shuttle structure'for tension I 7. In a 's'huttle5 the combinationof a runher, a bow having its ends adjoining the runner and\' abuttingan exterior surface thereof, and a guard bridging the angle'between oneof the legs of the bow-and the adj acent end portionof'the runner andfitted into each of them. I

In testimony whereof I afiiX my signature.

' OTTO I-IAGKENBER'G.

